Spatial conditioning of laser-plasma accelerated electron beams using magnetic solenoidal lenses

High-charge electron beams from laser-plasma accelerators (LPAs) can enable electron radiography, positron production, and high-flux x-ray generation. LPAs driven by kilojoule-class laser systems can produce electron beams with unprecedented amounts of charge (~ many 100s nC) but typically undesirable spatial properties such as transverse beam nonuniformity and large divergence. In this work, we demonstrate spatial conditioning of microcoulomb-class electron beams using magnetic solenoidal lenses. Due to ~ 10 T focusing fields, the electron beams produced here possess ≤ 4x higher electron fluence than in previous studies with comparable or better divergences. This performance is in general agreement with Boris pusher modeling, which will guide future experiments and optimization of this technique. This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Fusion Energy, under Award Number DE-SC0021057 and by the Department of Energy [National Nuclear Security Administration] University of Rochester "National Inertial Confinement Fusion Program" under Award Number DE-NA0004144.